Revision 0:ab21c5466a81, committed 2015-01-10

Comitter:

wim

Date:

Sat Jan 10 19:16:46 2015 +0000

Commit message:

Test program for HP03SA pressure and altitude sensor and for LM77 temperature sensor. The devices use an I2C interface.

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/HP03SA.lib	Sat Jan 10 19:16:46 2015 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/users/wim/code/HP03SA/#61bbd81782de

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LM77.lib	Sat Jan 10 19:16:46 2015 +0000
@@ -0,0 +1,1 @@
+http://developer.mbed.org/users/wim/code/LM77/#8e812deb9f66

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Jan 10 19:16:46 2015 +0000
@@ -0,0 +1,166 @@
+/* mbed HP03SA I2C Pressure and Temperature sensor Test
+ *      LM77 Temperature sensor Test
+ *
+ * Copyright (c) 2015 Wim Huiskamp
+ * Released under the MIT License: http://mbed.org/license/mit
+ *
+ * version 0.1 Initial Release
+ */
+#define PCF8593_TST            0
+#define LM77_TST               1
+#define HP03SA_TST             1
+
+#include "mbed.h"
+
+#if (HP03SA_TST == 1)
+#include "HP03SA.h"
+#endif
+
+#if (LM77_TST == 1)
+#include "LM77.h"
+#endif
+ 
+//Pin Defines for I2C Bus
+#define D_SDA                  p9
+#define D_SCL                  p10
+//#define D_SDA                  p28
+//#define D_SCL                  p27
+I2C i2c(D_SDA, D_SCL);
+
+//Pin Defines for XCLR
+#define D_XCLR                 p11  
+
+//Host PC Baudrate (Virtual Com Port on USB)
+#define D_BAUDRATE            9600
+//#define D_BAUDRATE            57600
+
+// mbed Interface Hardware definitions
+DigitalOut myled1(LED1);
+DigitalOut myled2(LED2);
+DigitalOut myled3(LED3);
+DigitalOut heartbeatLED(LED4);
+
+// Host PC Communication channels
+Serial pc(USBTX, USBRX); // tx, rx
+
+#if (HP03SA_TST == 1)
+// Generate the 32kHz master clock for HP03SA
+PwmOut mclk(p21);
+
+// Instantiate HP03SA
+HP03SA hp03sa(&i2c, D_XCLR); // I2C bus, XCLK Pin
+#endif
+
+#if (LM77_TST == 1)
+// Instantiate LM77
+LM77 lm77(&i2c, LM77_SA0); // I2C bus, XCLK Pin
+#endif
+
+int main() {
+  pc.baud(D_BAUDRATE);
+  pc.printf("\r\n\r\n");  
+  pc.printf("Hello world\r\n");
+
+#if (PCF8593_TST == 1)
+  char buffer[8];
+  char status;
+
+  //Init PCF8593 RTC
+  buffer[0] = 0x00; //control reg
+  buffer[1] = 0x00; //control reg value (32Khz osc)
+  status = i2c.write(0xA2, buffer, 2);
+
+  if (status == 0) {
+    pc.printf("RTC status = Ok\n\r");
+  }
+  else {
+    pc.printf("RTC status = Not Ok\n\r");      
+  }  
+#endif
+
+#if (LM77_TST == 1)
+  if (lm77.getStatus()) {
+    pc.printf("LM77 status = Ok\n\r");   
+
+    pc.printf("Critical Alert temperature from LM77 is %.1f [C]\r\n", lm77.getCritAlertTemp());     
+    pc.printf("Low Alert temperature from LM77 is %.1f [C]\r\n", lm77.getLowAlertTemp());     
+    pc.printf("High Alert temperature from LM77 is %.1f [C]\r\n", lm77.getHighAlertTemp());             
+    pc.printf("Alert Hysteresis from LM77 is %.1f [C]\r\n", lm77.getAlertHyst());  
+    wait(1.0);
+
+#if(0)
+#define CA          95.0f     
+#define LA           8.0f     
+#define HA          15.0f     
+#define HY           3.0f     
+    lm77.setCritAlertTemp(CA);     
+    lm77.setLowAlertTemp(LA);         
+    lm77.setHighAlertTemp(HA);
+    lm77.setAlertHyst(HY);             
+    pc.printf("Critical Alert temperature set at %.1f [C]. Read from LM77 is %.1f [°C]\r\n", CA, lm77.getCritAlertTemp());     
+    pc.printf("Low Alert temperature set at %.1f [C]. Read from LM77 is %.1f [°C]\r\n", LA, lm77.getLowAlertTemp());     
+    pc.printf("High Alert temperature set at %.1f [C]. Read from LM77 is %.1f [°C]\r\n", HA, lm77.getHighAlertTemp());             
+    pc.printf("Alert Hysteresis set at %.1f [C]. Read from LM77 is %.1f [°C]\r\n", HY, lm77.getAlertHyst());  
+#endif                      
+  }
+  else {
+    pc.printf("LM77 status = not Ok\n\r");            
+  } 
+#endif
+
+#if (HP03SA_TST == 1)
+  //Init MCLK
+  mclk.period_us(30);       //32768 KHz
+  mclk.pulsewidth_us(15);   //32768 KHz
+    
+  if (hp03sa.getStatus()) {
+    pc.printf("HP03S status = Ok\n\r");    
+  }
+  else {
+    pc.printf("HP03S status = not Ok\n\r");            
+  }
+  
+  // Take reading from sensor before setting calibration value!
+  hp03sa.sample();
+
+  // Set QNH pressure. The Altitude reading will be 0 for the set pressure.
+//    hp03sa.setPressure(10247);  // MSL pressure at time of testing 1024.7 hPa
+//                                // Results in getAltitude() = 6m because it matches local MSL pressure
+    
+  // Set QNH altitude. The Altitude reading will be the set value at current pressure.
+  hp03sa.setAltitude(6);          // About right where I live..
+#endif
+  
+  while(1) {
+#if (HP03SA_TST == 1)    
+    // Take reading from sensor            
+    hp03sa.sample();
+    
+    // Show Pressure    
+    pc.printf("Absolute atmospheric pressure is %.1f [hPa]\r\n", (float) hp03sa.getAbsPressure() / 10.0f);
+    pc.printf("Sealevel atmospheric pressure is %.1f [hPa]\r\n", (float) hp03sa.getSeaPressure(6) / 10.0f); // About right where I live..
+    
+    // Show Temperature
+//    pc.printf("Ambient temperature is %.1f [°C]\r\n", (float) hp03sa.getTemperatureInt() / 10.0f);       
+    pc.printf("Ambient temperature is %.1f [C]\r\n", hp03sa.getTemperature());       
+    pc.printf("Ambient temperature is %.1f [F]\r\n", hp03sa.celsiusToFahrenheit(hp03sa.getTemperature()) );       
+        
+    // Show Altitude
+    pc.printf("Altitude estimated at %d [m]\r\n", hp03sa.getAltitude());       
+
+    // Show Altitude Ft
+    pc.printf("Altitude estimated at %d [ft]\r\n", hp03sa.getAltitudeFt());       
+#endif
+
+#if (LM77_TST == 1)
+    // Show Temperature LM77
+//    pc.printf("Ambient temperature from LM77 is %.1f [°C]\r\n", (float) lm77.getTemperatureInt() / 10.0f);       
+    pc.printf("Ambient temperature from LM77 is %.1f [C]\r\n", lm77.getTemperature());     
+#endif
+
+    wait(1.0);
+    myled1 = 1;
+    wait(0.2);    
+    myled1 = 0;    
+  }
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sat Jan 10 19:16:46 2015 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/4fc01daae5a5
\ No newline at end of file